Amazon Secure Payment System Continue shopping “1990 OMC Cobra Stern Drives Service Manual 507878” has been added to your cart. Product Price Quantity Subtotal × LubriMatic 11556 Hypoid 90 Gear Lube for Outboards and Stern Drives, 1 Quart $13.71 LubriMatic 11556 Hypoid 90 Gear Lube for Outboards and Stern Drives, 1 Quart quantity $13.71 × 1990 OMC Cobra Stern Drives Service Manual 507878 $65.00 1990 OMC Cobra Stern Drives Service Manual 507878 quantity $65.00 Coupon: Apply coupon Update cart Cart totals Subtotal $78.71 Total $78.71 Proceed to checkout